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Differential Photothermal Deflection Spectroscopy Using a Single Position Sensor

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Abstract:

A differential dual-beam photothermal deflection spectrometer using a single position sensor is described. An excitation and a probe laser beam are directed simultaneously into a sample solution and a reference solution to provide real-time background correction. The probe beam that passes through the reference cell is folded back into the path of the sample-cell probe beam in such a way that only one position sensor is needed to monitor the deflection in both cells. Nd3+ solutions are used to demonstrate the effect of background correction and the sensitivity of this dual-beam photothermal deflection arrangement.

Keywords: Background correction; Photothermal deflection spectroscopy

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702884430416

Affiliations: 1: Lawrence Berkeley Laboratory, Berkeley, California, 94720 2: Lawrence Livermore National Laboratory, Livermore, California 94550

Publication date: August 1, 1988

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